Impacts of future land use on meteorological conditions over the Pearl River Delta Region
ZHOU Mi1,2, CHANG Ming3, LAI An-qi1, FAN Qi1, WANG Xue-mei2, LI Xun4, WANG Ming-jie5, CHEN Xun-lai5
1. Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, School of Atmospheric Science, Sun Yat-Sen University, Guangzhou 510275, China;
2. School of Physics, Peking University, Beijing 100871, China;
3. Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China;
4. School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510275, China;
5. Meteorological Bureau of Shenzhen Municipality, Shenzhen 518040, China
A coupled WRF/Noah/UCM model was employed to investigate the change of the underlying surface and simulate the impacts of urban expansion in the Pearl River Delta (PRD) on regional meteorological conditions in winter (January) and summer (July) in the future. The land use types were updated in the WRF model based on "the full scale strategic planning of the Pearl River Delta for the period of 2014~2020". In WRF model simulation, the GlobCover 2009 (GLC2009) underlying surface data were used in the control experiment, while the updated one was employed in the sensitivity experiment. Several conclusions can be drawn from this study:significant changes of surface energy balance were observed due to the change of the underlying surface types that are caused by urban expansion; urban temperatures in the PRD region increase by 0.75℃ and 1.20℃ respectively in January and in July; relative humidity decrease by 2.61% and by 6.88% respectively in January and in July; urban heat island effect will be strengthened; the temperature difference between urban areas and rural areas increased by 0.21℃ and by 0.41℃ respectively in January and in July; the superimposing effect of thermal circulation and the large-scale circulation resultd in decrease of the wind speed by 0.11m/s in January and increase by 0.11m/s in July. In addition, changes near the surface can influence the whole boundary layer and increase the boundary layer height.
周密, 常鸣, 赖安琪, 樊琦, 王雪梅, 李郇, 王明洁, 陈训来. 未来土地利用类型对珠江三角洲气象场的影响[J]. 中国环境科学, 2017, 37(8): 2896-2904.
ZHOU Mi, CHANG Ming, LAI An-qi, FAN Qi, WANG Xue-mei, LI Xun, WANG Ming-jie, CHEN Xun-lai. Impacts of future land use on meteorological conditions over the Pearl River Delta Region. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(8): 2896-2904.
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